Expansible bracelet.



R. LOOG.

EXPANSIBLE BRACELET.

APPLICATION FILED APR. 12, 1912.

1,034,47 1. Patented Aug. 6, 1912.

- INVEN ZTTORI/EY "rinirnp STATES PA TENT onricn.

' RICHARD LOOG, d1 IFORZHEIM, GERMANY.

v1:,xiunasnanr: BRACELET.

To all whom it may concern:

ject of the Emperor of Germany, residing at Pforzheim, in the Grand" Duchy of Baden. Germany, have invented certain ,-new and useful Improvements in Expansible Bracelets, of which the following is a specifica tion.

My invention in expansible bracelets relates to a bracelet structure consisting of. a plurality of links and housed springs connected up in a manner whereby the structure is adapted to expand and contract within the desired limits to provide the necessary expansion, to enable the bracelet to be passed over the hand of the wearer and on the other hand to sufficiently contract about the wrist to afiord the requisite security against accidental displacement.

My invention has particular reference in its features, to constructional detail, more particularly directed to the insurance of rigidity and strength as well as .the afford- 1 ing of facilities in manufacture which featurescond'uce to the object of my invention.

In the accompanying drawing, which forms a part of this specification when taken with the correlative appended descriptive matter, is illustrated the manner in which I expansible bracelet structure to practice, and the distinct features of novelty are referred to in the claims at the' conclusion of the specification.

'With reference to the drawings: Figure l is a side elevational view of the bracelet In a contracted condition. Fig. 2 is a like view to that of Fig. 1 illustrating the same in an expandedcondition. Fig. .3 1s a top plan view of the same illustrating the cond1- tion of the bracelet referred to in Fig. 1.

-Fi g. is an enlarged fragmentary sectional elevat1onal.v1ew taken through the link structure. Fig. 5 is an enlarged side elevational view of a type involving I ture. This type I shall designate a secondof link and guide pin ary link and guide pin. Fig. 6.is atop plan view thereof. Fi 7 is an enlarged perspective view of a lin plate and guide way provided with a pair of terminal tubular rivets. Fig. 8 is a' similar view of another similar and supplementary link plate having terminal solid rivets ada ted to telescope and mutually engage the tubular'rivets of the link plate illustrated in Fig. 7

or otherwise formed in. the inner surface 0 the link plate e at right angles to the surface of the llIlk "plate parallel with the curved formation one system of links in the struc-' 'BandC while the guide. way of each are correspondingly opposite each other. I shall refer to these two link plates when assembled, as a primary link structure. Fig. 9 is a transverse sectional. elevational view taken on the line 9-9 of, Fig. 4 as indicated by the large circle Fig. 2 or a mean between the proportion of the two-as may be diz'termined by the normal contracted condition of the bracelet on the wrist of the wearer to pre-- -sent the most artistic efiect.

B and C refer to terminal tubular rivetswhich project from the link plate A perpendicular thereto and parallel ith each other and at each of the terminals ghereof. I prefer to construct these tubula rivets of gold or other suitable material of which the bracelet is composed and shoulder them in and head them over in the manner of rlvets, whereby they will project rigidly and securely from the inner surface of the link plate A or that surface opposite to that of the link plate referred to in Fig. '8 when these two plates are assembled.

D refers to a pocketed guide way pressed A and has lateral walls d and and parallel with each other and of sa d link plate.

1 designates a link plate of identical form to that of the (plate A and is provided with a similar gui e we" 1 and terminal shouldered rivets 1 an 1, these are secured to the inner surface of the link plate 1, in a similar manner to the tubular rivets of the link plate A and are correspondingly disposed to' telescope and enga e therewith.

' designates an open link of curved formation, having its opposite lateral inner walls 1 and 2 parallel to each other formed of a contiguous strip 1 of suitable metal having its free ends united by soldering, welding or by any other well known manner I v smaller circle Fig. 1 or,

Specification of Letters fatent. I Patented Aug. 6, 1912. Application filed Apri112, 1912. Serial no. eaoms. f v

or when occasion demands, I may form the link E from a narrow band of seamless tubing. I 1

'Within the open link E and at one terminal thereof is a transverse guide pin. 2 which is secured in position by soldering it in the inner walls 1 and 2 and to the inner surface of the end of the strip 1 The link E I shall refer to as a secondary link member of the structure.

F designates compression springs; each of which is adapted to be engaged between the guide pins 2 and an adjacent tubular rivet of a pair of respectively primary and secondary links when these members are articulated in the formation of the bracelet; they are housed within the pockets and 1 of the primary links respectively and the Walls 1 and 2 of the secondary link. This disposition of the springs F is fully elucidated in Fig. 9.

In the assembling of my improved bracelet structure, the open link E is linked with the tubular rivet B of the link plate A, and a tubular rivet C of a second link plate A is similarly assembled in the open link E; whereby the tubular rivets B and C of the respective link plates, when assembled, will lie within the link E adjacent to each other.

It must be observed in the assembling of the link plate A with the open link E that the gulde pin 2 enters and is guided in the guide way or pocket D and that the edge of the strip L of the open link E lies in contact with the inner surface of the link plate A whereby the guide pin 2 and the link plate A and open link E will be in slidmg engagement with each other; after thus assembling a pair of these primary and secondary links the thrust spring F is interposed between the tubular rivet C and the guide pin 2 when it will be found, due to the compresslon of this spring; contraction between the prlmary and secondary link members will ensue.

The entire link structure requisite for the formation of the bracelet is preferably articulated in this manner, after which the llnk plates 1, having the solid shouldered rivets 1B and 1, may be assembled with the introduction of a system of double rivets between the link plates A and 1 mutually engaging with each other, that considerable ri idity of the primary link strucrigidity is afture is e ected and moreover,

structure by fordedto the secondary link the transverse solid guide pin the pocketed guide ways D and 1? of the ri id primary link structure and aving fully described my invention I claim as new and desire to secure Letters Patent of the United States- 1. In an expansible bracelet, a primary link structure and a secondary link structure coupled together, the primary link structure being providedwith a system of interposed mutually engaging telescopic rivets and lateral guide Ways and asecondarylink structure embracing a pair of said rlvets and a terminal guide pin carried by the secondary link structure engaging the guide Ways in another primary l1n structure.

2. In an expansible racelet, a primary link structureand a secondary link structure coupled together, the primary link structure being provided with a system of interposed spacing mutually engaging telescopic shouldered rivets and lateral guide ways, and the secondarylink structure embracing a pair of the said rivets of each of the consecutive links of the primary link structure, and a terminal guide pin carried by the secondary link structure engaging the guide ways in one of the links of the primary link structure, and a compres'slon 2 plying in spring interposed between the said guide pin and telescopic rivets.

In testimony whereof, I have slgned my name to this specification in the presence of two subscribing witnesses.

' RICHARD LOOG.

F. X. GRIGER, K. RE MMER.

I .Witnesses: 

